There is an "A" top and a "B" top to the aluminum hubs. The "A" top is the standard holes, plus a 4th hole, and the "B" top holes are in between the holes in the "A" top. 8 different ballstud positions.
The motor mount screws are eaiser to get to, but setting the gear mesh is still a chore. I only pull out my motor a couple times a year at best, so its not something that makes a difference to me.
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Radio Control Hobbies & Raceway
1258 South Main Street
Waterbury, CT. 06706
www.rchr.biz
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